CVE-2026-108698

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Source

https://cve.org/CVERecord?id=CVE-2026-108698

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-108698.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-108698

Published

2026-10-11T13:25:58Z

Modified

2026-10-28T02:30:39Z

Severity

8.3 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator

Summary

hyper-mcp through 0.8.3 OCI Plugin Signature Verification TOCTOU Race Condition

Details

hyper-mcp through 0.8.3 contains a signature verification bypass vulnerability in load_wasm in src/wasm/oci.rs that verifies the Cosign signature of a separately resolved tag rather than the loaded manifest. Attackers controlling registry responses for the tag can serve an unsigned malicious manifest to the loader and a signed one to Cosign, executing unsigned WebAssembly plugins with configured host capabilities.

Database specific

{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-367"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108698.json"
}

References

Affected packages

Git / github.com/hyper-mcp-rs/hyper-mcp

Affected ranges

Type

GIT

Repo

https://github.com/hyper-mcp-rs/hyper-mcp

Events

Introduced

Last Affected

08353e866c53ff072af932bd977180596a3746f3

Database specific

Show details

{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "last_affected": "0.8.3"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "last_affected": "0.8.3"
                }
            ],
            "source": "DESCRIPTION"
        }
    ]
}

Affected versions

v0.*

v0.1.0

v0.1.1

v0.1.2

v0.1.3

v0.1.4

v0.1.5

v0.1.6

v0.1.7

v0.1.8

v0.2.0

v0.2.1

v0.2.2

v0.2.3

v0.3.0

v0.3.1

v0.4.0

v0.4.2

v0.4.3

v0.4.4

v0.4.5

v0.4.6

v0.4.7

v0.5.0

v0.5.1

v0.5.2

v0.5.3

v0.5.4

v0.5.5

v0.5.6

v0.6.0

v0.6.1

v0.7.0

v0.7.1

v0.7.2

v0.7.3

v0.7.4

v0.8.0

v0.8.1

v0.8.2

v0.8.3

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-108698.json"